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As part of my attempt to return my 72LT1 close to stock status, I am replacing the electric fuel pump it came with back to the mechanical fuel pump. Does anyone have a photo how the fuel lines are routed. Thanks in advance.
Do you want the engine compartment or rear by the fuel tank? You can buy a complete fuel pump to carb fuel line kit for the LT-1 from Wilcox Corvette. You can also get fuel line kit for a 1967/8 Camaro Z/28 BUT! not the later 1969-72 one! I always install a lightweight fuel pump push rod on my HP motor rebuilds, keeps the fuel pump from failing at high RPMS that solid lifter motors rev to
Thank you for the photos. So I removed what I think is called a blank off plate, then pick up the new fuel pump. I am missing something based on what the blank off plate looks like and the fuel pump mount.
Since I have never encountered this part of this car or any small before, I am thinking what the blank off replaced had a cavity for the fuel pump to mount into.
Looking for some insight on what part I need to get in order to mount the new mechanical fuel pump. Thanks in advance.
The plate you need has a hole in it that is close to the same shape as the fuel pump is. Push rod goes in, then the plate with a gasket under it, a pair of 1/4 bolts hold that on and then the pump and it's gasket with a pair of 3/8 bolts.
...And so you're not fighting the rod sliding out as you maneuver the pump into it's home, put a good coating of assembly lube on the pump rod before you slide it in there. Helps to hold it up high where it needs to be.
...And so you're not fighting the rod sliding out as you maneuver the pump into it's home, put a good coating of assembly lube on the pump rod before you slide it in there. Helps to hold it up high where it needs to be.
And to help you fit the pushrod onto the base circle of the cam, disconnect power to the coil and have a friend crank the engine while you are holding the pushrod. You will feel it go up and then down. Up is good. This way it will be easier to insert the pump and get the bolts started.
Finally, or actually firstly, make sure you have the correct pump. Some OEM Corvette pumps have a return line outlet on the pump that connects to the fuel return line on the chassis next to the supply line from the tank.
Whatever one fits, make sure you buy the correct "S" shaped rubber fuel lines from a company such as Willcox. DO NOT FIT ordinary rubber fuel line and try to bend it into shape. You will fail and so will the engine eventually when the fuel line collapses in on itself.
Am I the only one who uses a long bolt through this hole to hold the pump's Push Rod up in place so it doesn't fall down as the Fuel Pump is being mounted?
Am I the only one who uses a long bolt through this hole to hold the pump's Push Rod up in place so it doesn't fall down as the Fuel Pump is being mounted?
Thank you everyone for the great TIPS, I wanted to complete this task after work today. Since I have the means to fabricate I trace the fuel pump gasket on the blank off plate I removed and cut the opening for the fuel pump lever, thinking I should finish it. To my surprise the fitting for exit side of the fuel pump was not easy to find. Had to order one from NAPA, another dilemma. The fuel pump I ordered from the Autozone does not look anything like yours. this what mine looks like. Do I have the correct pump. They said this is for a car with the Holley carb, the inlet is facing towards the block.
Am I the only one who uses a long bolt through this hole to hold the pump's Push Rod up in place so it doesn't fall down as the Fuel Pump is being mounted?
That works too!!! The old man just taught me with assembly lube a kazillion years ago and that's my way... But it's only one way. Lots of good advice here.
Thank you again for all the great tips, I did use the "extra lube" techniques. But MAN... I've installed a few fuel pump in my time, but never that challenging as this one. It's complete, now all I have to do is remove the electric pump....
04-18-2015, 07:55 PM
Mechanical fuel Pump
